植被过滤带拦截径流和泥沙效果的VFSMOD模型适用性研究的中期报告-第一文库 | 海量文档资源下载与分享平台

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植被过滤带拦截径流和泥沙效果的VFSMOD模型适用性研究的中期报告Abstract:Vegetationfilterstrip(VFS)isaneffectivemeasureforcontrollingrunoffandsedimentloss.InordertoinvestigatetheapplicabilityofVFSMODmodelinsimulatingtherunoffandsedimentinterceptioneffectofvegetationfilterstrip,afieldexperimentwasconductedinaslopingfarmlandoftheThreeGorgesReservoirArea.TheVFSMODmodelwasbuiltbasedonthecharacteristicsofthevegetationfilterstripandthehydrologicalprocessesoftheslopeland.Themodelparameterswerecalibratedandvalidatedwiththeobserveddata.ThepreliminaryresultsshowedthattheVFSMODmodelcouldwellsimulatetherunoffprocessandsedimentinterceptioneffectofthevegetationfilterstrip.ThemodelcouldprovideareliablebasisfordesigningandevaluatingthevegetationfilterstripintheThreeGorgesReservoirArea.Introduction:Thevegetationfilterstrip(VFS)isawidelyusedmeasureofnon-pointsourcepollutioncontrol,whichcaneffectivelyinterceptthesedimentandpollutantsinrunoff.TheVFScanalsoplayanimportantroleinregulatingthehydrologicalprocessesandmaintainingtheecologicalenvironment.Inrecentyears,theVFShasbeenwidelyappliedintheslopingfarmlandoftheThreeGorgesReservoirArea.However,thereisstillalackofeffectivemodelstoevaluatetheeffectivenessofVFSincontrollingtherunoffandsedimentloss.Inthisstudy,weconductedafieldexperimentinaslopingfarmlandoftheThreeGorgesReservoirArea.TheVFSMODmodelwasdevelopedtosimulatethehydrologicalprocessesoftheVFS,andthefielddatawasusedtocalibrateandvalidatethemodel.ThepurposeofthisstudyistoevaluatetheapplicabilityoftheVFSMODmodelinsimulatingtherunoffandsedimentinterceptioneffectofthevegetationfilterstrip,andprovideascientificbasisfordesigningandevaluatingtheVFS.Materialsandmethods:Studyarea:ThefieldexperimentwasconductedinaslopingfarmlandoftheThreeGorgesReservoirArea,intheYilingDistrictofYichangCity.Thestudysiteislocatedatthelongitudeof111°21′E,andthelatitudeof30°44′N.Theslopegradientofthestudysiteisabout5°,andthevegetationcoverageisabout20%.VFSMODmodel:TheVFSMODmodelisaone-dimensional,physically-basedmodel,whichcansimula